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Species · Tennessee · BBS 2025 Release · 1966–2024

Louisiana Waterthrush Population Trend in Tennessee

All statesForest birds

Louisiana Waterthrush in Tennessee has surged: up 81% on the route-weighted index since 1968.

+81%Since 1968TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
50Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
58YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Louisiana Waterthrush Trends in TennesseeNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Louisiana Waterthrush has surged in Tennessee: up 81% on the route-weighted index since 1968.

Louisiana Waterthrush Population Forecast in Tennessee

If the recent trend holds, Louisiana Waterthrush in Tennessee is projected to stay roughly flat through 2029, near 1.4 (95% range 0.89–1.9). A 5-year backtest shows a typical error of ±16.4%, with 100% of held-out values landing inside the 95% band.

+5%Change by 2029TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
1.4Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.89–1.995% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±16.4%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Louisiana Waterthrush in Tennessee is projected to stay roughly flat through 2029, near 1.4 (95% range 0.89–1.9). A 5-year backtest shows a typical error of ±16.4%, with 100% of held-out values landing inside the 95% band.19662029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20251.30.831.8
20261.30.841.8
20271.40.861.9
20281.40.871.9
20291.40.891.9

Louisiana Waterthrush Survey Routes in Tennessee

Routes recording Louisiana Waterthrush in Tennessee.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Willis Sprng820221995
Tellico520241995
Big Sandy420241977
Fish Springs420231967
Mansfield320241975
Pond Creek320241968
Collinwood320241966
Signal Mtn220231979
Pawpaw219691969
Moscow220162006
Silerton220241971
Harbuck220131994
Campbellsville220161967
Lewis Forest220241966
Petersburg220062006
Silver Pt220241967
Oliver Spgs220221967
Mcfarland219911967
Mt Olive219751967
Cades Cove220241989
Tiptonville120161976
Brownsville120112011
Jones Gap120132013
Whiteville120231970
Sweetlips120221971

Louisiana Waterthrush Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatexasvermontvirginiawest-virginiawisconsin

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.